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Troubleshooting procedure for fillet failure (and any other failed feature, for that matter)
matt_keveney
Member Posts: 2 ✭
Experienced designer coming up to speed on OnShape.
When applying fillets I find that the tool frequently fails for no obvious reason. This seems more common on complex shapes.
In this example, I'm trying to fillet the joint between ribs in a hollow, irregular shape.
The fillet in the left hand cavity works fine. The right one fails, even though it's a mirror image.
The only error I can find is "Fillet 6 did not regenerate properly: Adjoining edge not filleted."
The entire feature highlighted purple. Close examination reveals a gap showing the offending edge highlighted red. There is nothing telling me what is wrong with this edge.
Please understand that I'm looking for a general, step-wise procedure to zero-in and solve this kind of problem, rather than a litany of "things I could try" or workarounds.
Is there a way to get more detail on errors like this? Maybe a log file somewhere?
-Matt
Comments
Not really more detail available. just kind of by experience you learn limitations/why things error. in you case it looks like the fillet may be trying to self intersect. It doesn't know how to navigate the extreme edges of the fillet as it makes its way around the inside curves. can use a smaller radius or variable fillet in that area. or some other solution.
We always try to provide error messages that are as helpful as possible, as in the one above "…Adjoining edge not filleted." This one implies that, for one reason or another, the tangency propagation did not grab that edge. Perhaps the geometry is slightly not symmetric or tangent (within geometric tolerances)?
As far as troubleshooting, in this case try adding a selection of the additional "missing" edge…
Beyond that, it will be a lot easier if you provide a link to a model so we can look at it in more detail. As you know, filleting is a complex subject and requires a lot more context than the images above.
I don't think Adjoining edge not filleted implies to the user that it could not "grab" the edge. Its possible that it implies the opposite that the program knows it's there and did indeed grab it to present it to the user as an issue.
I have a experienced some issues recently with mirrored geometry not behaving the same as the "original" side, specifically when working with fillets (and drafts). My guess would be that the software uses the "context" provided by the feature creation before the fillet to figure out how to apply the fillet but that gets lost on the "mirrored" side, or something along these lines but you would think the mirrored geometry would work the same!
A couple tricks for troubleshooting fillets: